Böttcher's death confirms that Simon and Karo are on the right path. At his funeral, they identify a person of interest known as `KoKo-Wutzke', Gärster's former boss, and a man from Karo's complicated past.

Frauke Beckmann identifies the mole within the ZERV; Karo is in Wolfsburg meeting her father, who gives her an important lead into the case.